I've asked a question that's mostly about optics with a little touch of thermodynamics to it: Can you use an invisibility shield to insulate from infrared radiation?
But I'm getting 2 close votes to close it as "not mainstream physics".
At worst I am definitely guilty of asking a borderline engineering question, and I wouldn't debate any close votes of that nature. But nothing in my question assumes anything other than classical optics.
assume mirrors heat up when reflecting (which the linked question shows is widely believed to be true by the community, for reasons related to conservation of momentum + energy (which I believe is considered a mainstream theory)).
Then question what happens if you consider an object like an invisibility cloak (which is definitely possible to build using sets of lenses). Here's a company that literally builds these things out of lenses for the military https://www.youtube.com/watch?v=KckHomYdiFc
It's just an extension of a thought experiment FROM mainstream physics, I even link a post that I build off of which is clearly actual mainstream physics as agreed by the community.
So why do people think that this is not physics? Is there any axiom or assumption I've made in the problem that is not widely believed to be true?